Determining additional power losses in the electricity supply systems due to current's higher harmonics

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.155672

Keywords:

load current higher harmonics, power losses, harmonic distortions coefficient, skin effect

Abstract

The paper reports results of research into the influence of higher harmonics of the power source voltage and the load current on power losses in an electric network. The relevance of this study is predetermined by the ever-increasing number of the electric energy pulse consumers, which leads to an increase in the number of higher harmonics at power supply systems. In turn, higher harmonics cause deterioration not only in the qualitative indicators for electricity, but a significant reduction in energy efficiency as well. The study that we conducted has shown that existing analytical dependences of a network's active resistance on the higher harmonics' frequencies are mutually exclusive, contradictory, and inaccurate because they do not take into consideration the geometrical characteristics of the network conductors. Based on the first-order Bessel equations, we have obtained refined analytical dependences of a network's active resistance on the higher harmonics' frequencies, taking into consideration the geometrical properties of wires. It has been established that in addition to an increase in the active resistance value due to the influence of a skin effect, higher harmonics predetermine additional losses caused by an increase in the root-mean-square current value. We present the dependence of additional power losses and efficiency factor in the electric network as a function of values for the load current harmonic distortions coefficient and the coefficients for harmonic distortions in a power source voltage. It was established that the network current higher harmonics, caused by the pulse load, lead to the bigger losses in the network than the higher harmonics from the power source. The results obtained in this study could be used in the calculation of energy losses in electric networks due to higher harmonics and while estimating economic efficiency when introducing filter compensating devices

Author Biographies

Oleksandr Plakhtii, Limited Liability Company «VО ОVЕN» Hvardeitsev-Shyronyntsev str., 3A, Kharkiv, Ukraine, 61153

PhD, Electronic Engineer

Volodymyr Nerubatskyi, Ukrainian State University of Railway Transport Feuerbach sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of electric power engineering, electrical engineering and electromechanics

Igor Ryshchenko, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61000

Doctor of Technical Sciences, Professor, Director

Institute of Chemical Technology and Engineering

Olena Zinchenko, Ukrainian State University of Railway Transport Feuerbach sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of electric power engineering, electrical engineering and electromechanics

Sergiy Tykhonravov, Ukrainian State University of Railway Transport Feuerbach sq., 7, Kharkiv, Ukraine, 61050

PhD, Associate Professor

Department of electric power engineering, electrical engineering and electromechanics

Denys Hordiienko, Private JSC «ELAKS» Ak. Proskury str., 1, Kharkiv, Ukraine, 61085

Еngineer

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Published

2019-02-04

How to Cite

Plakhtii, O., Nerubatskyi, V., Ryshchenko, I., Zinchenko, O., Tykhonravov, S., & Hordiienko, D. (2019). Determining additional power losses in the electricity supply systems due to current’s higher harmonics. Eastern-European Journal of Enterprise Technologies, 1(8 (97), 6–13. https://doi.org/10.15587/1729-4061.2019.155672

Issue

Vol. 1 No. 8 (97) (2019): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2019 Oleksandr Plakhtii, Volodymyr Nerubatskyi, Igor Ryshchenko, Olena Zinchenko, Sergiy Tykhonravov, Denys Hordiienko

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